Conduit for electric conductors



p 1930- c F. WHITEHOUSE 1,776,484

CONDUIT FOR ELECTRIC CONDUCTORS Filed Oct. 22, 1928 Patented Sept. 23,1930 I? i i i i UNITED STATES PATENT OFFICE CHARLES FREDERIC WHITEHOUSE,OF LEEDS, ENGLAND CONDUI'I FOR ELECTRICCONDUCTORS Application filedOctober 22, 1928, Serial No. 314,227, and in Great Britain October 24,1927.

This invention relates to multi-way consuitable material and one end isfurnished duits for electric conductors, and has for its with anenlarged flange B of cylindrical object to provide an improved form ofsuch shape provided with recesses or sockets to reconduit. ceive andregister with the spigot end C of According to this invention, insteadof the the next adjacent conduit. All the lengths 5 individual conduitsor ways extending parcan be cast in a single mould as each length isallel to the axis of the conduit, each individexactly similar andadjacent lengths are ual conduit or way revolves round the centurned sothat the spigot end C of one registral axis of the composite conduit.Thus ters with the socket B of the next, the cylineach individualconduit or way follows a drical or circular socket of each length aswill Bu helical path, the pitch of the helix being prebe seen, being ofenlarged diameter so that determined so that each way revolves round thesockets form a series of projecting supthe central axis a predeterminednumber of ports of constant external shape and diame times in a givenlength. ter despite the pitch or lay of the individual The actual numberof ways or conduits conduits. 65 may vary, but preferably the externalshape Obviously the pitch of the helix or lay of of the conduit is suchas to enable similar the individual conduits may vary so long as lengthsof conduit to be assembled and easily the conductors can easily be drawnthrough laid in a trench and for this purpose the the conduits after thelatter have been laid socket end of each section or length is convenandthe lengths of conduit can easily be cast 70 iently circular in plan andof greater diameor otherwise formed Without difiiculty, a conter thanthe main portion so that, when asvenient degree of variation in eachtwo-footsembled, the line of sections rests upon the enl th b ing either4 or 6 above menlarged socket portions. tioned.

One construction of multi-way condu t 210 With a conduit furnished withhelical ways 75 COICllIlg 130 this invention is illustrated by wayaccording to this invention the electric ()0n of example in theaccompanying draWing ductors are automatically wormed together. in whichFurther, conductors drawn through con- Figure 1 is an end elevation of asingle duits having helical ways according to this length or section,invention possess the further advantage over 80 Figure 2 is a sectionthe c 0n the line iimilar cables when laid in conduits parallel IIII ofFigure 1, and to the cable axis in that they Will have less Figure 3Show? in elevation 011 a interference with adjacent telephone, teleduced scale a series of nine lengths connectgraph othercables edillustratlng the hehcal Course It will be appreciated that althoughexact- 85 of the lndn'ldual ways' ly similar unit lengths are preferablyem- In practice where there is, say, a 6 devia- 1 d u n y p oye this isnot absolutely necessary and tlon 111 each tWO'fOOt length of condulteach that alternative means for connecting adjailldivildualgvay willgnakqa g g a 3 cent conduits together may be adopted in- 40 slxty engt Sor one urn m One ml re n stead of the socket arrangement illustrated v1/ o Z, I gg s g i sfi g gii fg g gi i g i gi gg i and described withoutdepartmg from this dred and sixty feet or eighty lengths The mventlonConstruction illustrated in Figure 1 18 lVhat I claim as my inventionand desire vided with four individual Ways A which are to by LettersPatten? 1S 5 not f d parallel to one th as i usua'L i. A conduit forelectric conductors built h i di id l d it or Way revolving up from aseries of similar sectlons each hav round the central axis of thecomposite conmg a plurality of individual Ways, each of duit so as tofollow a helical path. Each secsaid ways revolving round the centralaxis 50 tion may be formed of earthenware or other or the compos1teconduit so as to follow a name to this specification.

CHARLES FREDERIC WHITEHOUSE.

